Definitely see another vet, quickly or it will probably be permanent!! My frenchie has hurt her back a couple of times. It is common for "dwarf" type breeds to have spinal anomalies which cause back problems, kind of like dacshunds.
Cricket has butterfly and hemi vertebrae, a couple of each. The vet immediately did xrays (the first time) put her on steriods, pain meds and tagament to protect her stomach from the other meds. She was on strict crate rest for 6 weeks. She didn't lose complete control of her back legs, but almost. She staggered heavily and fell, wobbled, had no pain sensation in them, etc. We would carry her outside, wrap a towel under belly near her hips and help her stand while she went potty. She completely recovered. She was in a lot of pain the first few days until the swelling went down. We were told if she wasn't doing better in a few days, it was surgery or put her down, because of her extreme pain. Oh, and our vet couldn't do the surgery because of how complex it was. We had to go to MSU and were told it would cost thousands of dollars. Thank goodness she recovered!!
Cricket has butterfly and hemi vertebrae, a couple of each. The vet immediately did xrays (the first time) put her on steriods, pain meds and tagament to protect her stomach from the other meds. She was on strict crate rest for 6 weeks. She didn't lose complete control of her back legs, but almost. She staggered heavily and fell, wobbled, had no pain sensation in them, etc. We would carry her outside, wrap a towel under belly near her hips and help her stand while she went potty. She completely recovered. She was in a lot of pain the first few days until the swelling went down. We were told if she wasn't doing better in a few days, it was surgery or put her down, because of her extreme pain. Oh, and our vet couldn't do the surgery because of how complex it was. We had to go to MSU and were told it would cost thousands of dollars. Thank goodness she recovered!!